(fixed) Re: 8-STABLE interrupt storm on atapci(?), Dell Inspiron 580

[Alexander Motin]

Jeremy Chadwick wrote:
> On Fri, Mar 12, 2010 at 05:57:44PM +0100, Pierre Beyssac wrote:
>>> Possibly this is the source of the problem (specifically, it looks like
>>> FreeBSD doesn't have proper device ID knowledge of what this controller
>>> is.  I believe that's because this system is *very* new, a Core i3/i5/i7
>>> system)?
>> I didn't notice that, you're right! The system is brand new, got
>> it delivered on Tuesday. Another odd thing is that the controllers
>> have differents IDs, 0x3b208086 vs 0x3b268086.
>>
>> I added the IDs to ata-intel.c and it fixes the problem.
>>
>> Preparing a patch. Thanks for the hint!
>> -- 
>> Pierre Beyssac	      	    		pb at fasterix.frmug.org
> 
>> --- ata-intel.c.orig	2010-03-12 17:02:00.680011011 +0100
>> +++ ata-intel.c	2010-03-12 16:55:54.773702505 +0100
>> @@ -156,6 +156,8 @@
>>       { 0x3a2d8086,       0, INTEL_AHCI, 0, ATA_SA300, "PCH" },
>>       { 0x3a2e8086,       0, INTEL_AHCI, 0, ATA_SA300, "PCH" },
>>       { 0x3a2f8086,       0, INTEL_AHCI, 0, ATA_SA300, "PCH" },
>> +     { 0x3b208086,       0, INTEL_AHCI, 0, ATA_SA300, "PCH" },
>> +     { 0x3b268086,       0, INTEL_AHCI, 0, ATA_SA300, "PCH" },
>>       { ATA_I31244,       0,          0, 2, ATA_SA150, "31244" },
>>       { ATA_ISCH,         0,          0, 1, ATA_UDMA5, "SCH" },
>>       { 0, 0, 0, 0, 0, 0}};
> 
> I had a chance to review the Intel 5 Series and 3400 Series Chipset
> document, which is specific to the PCH.  The breakdown for those
> two Device IDs, under Vendor ID 0x8086 (Intel), is:
> 
> Device ID 0x3b20
> 	- PCH SATA controller
> 	- Desktop revision, non-AHCI and non-RAID Mode
> 	- Ports 0,1,2,3
> 
> Device ID 0x3b26
> 	- PCH SATA controller
> 	- Desktop revision, non-AHCI and non-RAID mode
> 	- Ports 4,5
> 
> So I'm not sure the setting of the INTEL_AHCI flag there is correct
> for these controllers.  mav@ will need to chime in here.

Except ICH6 Intel uses separate IDs for AHCI and non-AHCI SATA
controller modes. So this flag is not completely correct. But probably
it shoudn't be just removed, as it is checked in other place. I know
about this and going to handle it later. It's not a problem now.

> Regarding the "dual device IDs": what this means is that ports 0-3 are
> tied to one device on the PCI bus, and ports 4-5 are tied to another
> device on the PCI bus.  They might have chosen to do this so they could
> segregate which ports do what or operate differently somehow.
> 
> mav@ may also want to review the specification since it mentions a bunch
> of other Device IDs which don't appear to be in the above list:
> 
> http://www.intel.com/Assets/PDF/specupdate/322170.pdf

Thanks.

PS: Check BIOS settings for enabling AHCI mode.

-- 
Alexander Motin